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    <h1>列表央视</h1>
    <ul class="f1">
        <li>选项</li>
        <li>选项</li>
        <li>选项</li>
    </ul>
    <ul class="f2">
        <li>选项</li>
        <li>选项</li>
        <li>选项</li>
    </ul>
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